Oil-cup.



L. C. DUTRO.

OIL CUP.

APPLICATIONHLED SEPT. 2. 19144 1,162,586. Patented Nov. 30, 1915.

WITNESSES l/VVE/VTOH W 2125721 ['jzzfim 'I BVMV A TTORNEYS 59' 'It must be understood that, when the on rarer WERE LESLIE CARLdDUTRO, OF POCATEIlLO, IDAHO, ASSIGNOR OF ONE-HALF 'I'O WILLIAM A.

ZETSCHE, F POCATELLO, IDAHO.

OIL-CUP.

M Specification of Let'teps'Eatent.

rammed Nov. so, 1915.

Application filed September 2, 1914. Serial N o. 859,814.

T0 allavhom z'tmag Gamer-71;.

Be it known that I, LESLIE C. DUTRO, a citizen of the United States, and a resident of Poca'tello, in the county of Bannock and 5 State of Idaho, have invented certainnew and useful Improvements in Oil-Cups, of which the following is a specification.-

My invention relates to 'lubricatiOn of bearings, and the main object. thereof is to v provide an oil cup which will deliver oil to a bearing only at the time and in the degree of need; a further object is to provide means for adjusting the relationship'between the need and the feed of the oil and further objects are to provide such oil cups which are simple in construction, positive in oper ation, well adapted -to the purpose for-which they are intended, and comparatively inexpenslve.

My invention is fully described in the following specification, of which the accorn panying drawings form a part, in which the separate parts are designated by the same reference characters in each of the views,

and in which Figure 1 is an elevation of an oil cup con-' structed; in accordance with my present invention; Fig. 2 is a-central, vertical, section therethrough; and Fig.- 3 is a plan view thereof, with the cap removed.

In the drawings "forming a partof this application .I have shown an o'il cup 4 having a removable cap or cover 5 mounted thereon in an air-tightmanner, and a well cas1ng6 screwed into the bottom thereof and held by means of a set-screw 7, said well casing having a centrally arranged tube 8 extending upwardly from the bottoin'thereof-andrthe bore of which opens through said 0 bottom, as shown at 9.

In the form illustrated, the tube 8 isof a height approximating one-halfthe height of the well casing 6, and is internally screwthreaded to receive'a supplemental tube 10 vertically adjustable therein, and it will be noted that the exterior of the well casing .6 is also screw-threaded for engagement with thehousing of a journal, indicated by dotted lines in Figs. 1 and 2:

the. fact .that-the-cap 5 is air tight; when the take the place of the oil bearing begins to heat, the temperature of the well casing 6 is raised correspondingly, thereby causing the oil in the cup to expand, if the cup "be full of oil, or the oil and air if the cup be only partially filled, and this expansion, causes a portion of the oil to be forced through the tube 8 and to the point of use, the degree of which is determined by the degree of temperature of the well casing (Sand consequent expansion of the contents of the cup, oil, or oil and air. v

7 As soon as the bearing cools, the temperature of the well casing 6 falls, and the con-' tents of the cup contracts, thereby stopping the feed of'oil, and thi's contraction of the cups bontentsalso draws in enough air to which had been forced out of the cup, and the cup is ready for another operation.

Inasmuchas the well casing 6 is the first to feel the changes in temperature, the oil therein is the first affected, and, if the tube 8 is. ofi'relatively small height, this oil will immediately feed to the bearings, and-this might result in a too free feed; I therefore provide the supplemental tube 10 which may be-a'djusted vertically in the tube 8 to alter the moment of feed, but, for ordinary purposes and with known qualities (if oils, the height of the tube 8 may be fixed and the tube 10 dispensed with.

As already stated, the air in the cup is not under atmospheric pressure; as a matter of fact, when not entirely filled with oil the air within the cup is slightly below atmospheric pressuredue to the weight of the oil in the cup. the length of the feed tube is to regulate the amount of oil in said feed tube, the longer the feed tube is the more oil will be contained therein; now, say there is a rise of three or four degrees in the temperature of the bearings; this will cause a correspond- .ing rise in temperature of the oil in the cup.

sion causing a' corresponding air pressure within the cup, these three drops of oil drop out of the feed tube on to the shaft, and this p lessens the'friction in the bearings, causing theshaft to return to normal temperature; this causes the oil in the cup to contract, say three drops, and, if the feed tube holds tea drops, thiswill leave seven drops in the feed tube in the toppart, and air will be in The'reason for regulating thevbottom part; if the temperature of the bearingsagain rises the same three or four perature, thereby catching-a bearing before it really starts to heat. It will be noted that there is a space surrounding the-tubes 8 and 10, thereby enabling the.heat of the bearing to reach the main body of the oil much more quicklyand with a materially less rise i'n temperature.

It will be noted, from the above, that the oil in my cupis not forced from the cup by air admitted thereto under pressure, nor is it drawn therefrom by suction, nor does my cup extend to the shaft in the manner of some oil cups known to me.

Air is permitted to enter the oil cup through the tube 10 only in the degree of requirement, and the air in the cup serves as a cushion to insure the discharge of oil from my cup when required, regardless of the amount of oil, in the cup, provided that it covers the upper end of the tube 10.

It will thus be seen that my oil cup is entirely automatic in action, all the attention ing, and' the moment of stop and start of feeding is under control by extending the tube l0 a greater or less distance into the body of the oil. y

Reserving the right to make such changes in the form shown as come within the scope of the following claims, what I claim as new, and desire to secure by Letters Patent, is I An oil'cup having anopening in the bottom thereof, a well casing fitted into said opening and provided with a central opening in the bottom thereof, a tube extended upwardly from said central casing opening to a point intermediate the height of said casing, a supplemental tube vertically adjustable in said first named tube, said central opening being of relatively small diameter and approximating the diameter of the bore of said supplemental tube.

In testimony whereof I have signed my name to this specifieation'in the presence of two subscribing witnesses.

' LESLIE CARL DUTRO.

Vitnesses:

L. D. BROWN,

Axxnr'rn K. WHITE.

Copies of this patont niay be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

